1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * NXP Wireless LAN device driver: scan ioctl and command handling 4 * 5 * Copyright 2011-2020 NXP 6 */ 7 8 #include "decl.h" 9 #include "ioctl.h" 10 #include "util.h" 11 #include "fw.h" 12 #include "main.h" 13 #include "11n.h" 14 #include "cfg80211.h" 15 16 /* The maximum number of channels the firmware can scan per command */ 17 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14 18 19 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4 20 21 /* Memory needed to store a max sized Channel List TLV for a firmware scan */ 22 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \ 23 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \ 24 *sizeof(struct mwifiex_chan_scan_param_set))) 25 26 /* Memory needed to store supported rate */ 27 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \ 28 + HOSTCMD_SUPPORTED_RATES) 29 30 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware 31 scan */ 32 #define WILDCARD_SSID_TLV_MAX_SIZE \ 33 (MWIFIEX_MAX_SSID_LIST_LENGTH * \ 34 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \ 35 + IEEE80211_MAX_SSID_LEN)) 36 37 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */ 38 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \ 39 + sizeof(struct mwifiex_ie_types_num_probes) \ 40 + sizeof(struct mwifiex_ie_types_htcap) \ 41 + CHAN_TLV_MAX_SIZE \ 42 + RATE_TLV_MAX_SIZE \ 43 + WILDCARD_SSID_TLV_MAX_SIZE) 44 45 46 union mwifiex_scan_cmd_config_tlv { 47 /* Scan configuration (variable length) */ 48 struct mwifiex_scan_cmd_config config; 49 /* Max allocated block */ 50 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC]; 51 }; 52 53 enum cipher_suite { 54 CIPHER_SUITE_TKIP, 55 CIPHER_SUITE_CCMP, 56 CIPHER_SUITE_MAX 57 }; 58 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { 59 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ 60 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ 61 }; 62 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { 63 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ 64 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ 65 }; 66 67 static void 68 _dbg_security_flags(int log_level, const char *func, const char *desc, 69 struct mwifiex_private *priv, 70 struct mwifiex_bssdescriptor *bss_desc) 71 { 72 _mwifiex_dbg(priv->adapter, log_level, 73 "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n", 74 func, desc, 75 bss_desc->bcn_wpa_ie ? 76 bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0, 77 bss_desc->bcn_rsn_ie ? 78 bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0, 79 priv->sec_info.wep_enabled ? "e" : "d", 80 priv->sec_info.wpa_enabled ? "e" : "d", 81 priv->sec_info.wpa2_enabled ? "e" : "d", 82 priv->sec_info.encryption_mode, 83 bss_desc->privacy); 84 } 85 #define dbg_security_flags(mask, desc, priv, bss_desc) \ 86 _dbg_security_flags(MWIFIEX_DBG_##mask, desc, __func__, priv, bss_desc) 87 88 static bool 89 has_ieee_hdr(struct ieee_types_generic *ie, u8 key) 90 { 91 return (ie && ie->ieee_hdr.element_id == key); 92 } 93 94 static bool 95 has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key) 96 { 97 return (ie && ie->vend_hdr.element_id == key); 98 } 99 100 /* 101 * This function parses a given IE for a given OUI. 102 * 103 * This is used to parse a WPA/RSN IE to find if it has 104 * a given oui in PTK. 105 */ 106 static u8 107 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) 108 { 109 u8 count; 110 111 count = iebody->ptk_cnt[0]; 112 113 /* There could be multiple OUIs for PTK hence 114 1) Take the length. 115 2) Check all the OUIs for AES. 116 3) If one of them is AES then pass success. */ 117 while (count) { 118 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) 119 return MWIFIEX_OUI_PRESENT; 120 121 --count; 122 if (count) 123 iebody = (struct ie_body *) ((u8 *) iebody + 124 sizeof(iebody->ptk_body)); 125 } 126 127 pr_debug("info: %s: OUI is not found in PTK\n", __func__); 128 return MWIFIEX_OUI_NOT_PRESENT; 129 } 130 131 /* 132 * This function checks if a given OUI is present in a RSN IE. 133 * 134 * The function first checks if a RSN IE is present or not in the 135 * BSS descriptor. It tries to locate the OUI only if such an IE is 136 * present. 137 */ 138 static u8 139 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 140 { 141 u8 *oui; 142 struct ie_body *iebody; 143 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 144 145 if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 146 iebody = (struct ie_body *) 147 (((u8 *) bss_desc->bcn_rsn_ie->data) + 148 RSN_GTK_OUI_OFFSET); 149 oui = &mwifiex_rsn_oui[cipher][0]; 150 ret = mwifiex_search_oui_in_ie(iebody, oui); 151 if (ret) 152 return ret; 153 } 154 return ret; 155 } 156 157 /* 158 * This function checks if a given OUI is present in a WPA IE. 159 * 160 * The function first checks if a WPA IE is present or not in the 161 * BSS descriptor. It tries to locate the OUI only if such an IE is 162 * present. 163 */ 164 static u8 165 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 166 { 167 u8 *oui; 168 struct ie_body *iebody; 169 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 170 171 if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) { 172 iebody = (struct ie_body *)((u8 *)bss_desc->bcn_wpa_ie->data + 173 WPA_GTK_OUI_OFFSET); 174 oui = &mwifiex_wpa_oui[cipher][0]; 175 ret = mwifiex_search_oui_in_ie(iebody, oui); 176 if (ret) 177 return ret; 178 } 179 return ret; 180 } 181 182 /* 183 * This function compares two SSIDs and checks if they match. 184 */ 185 s32 186 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2) 187 { 188 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) 189 return -1; 190 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); 191 } 192 193 /* 194 * This function checks if wapi is enabled in driver and scanned network is 195 * compatible with it. 196 */ 197 static bool 198 mwifiex_is_bss_wapi(struct mwifiex_private *priv, 199 struct mwifiex_bssdescriptor *bss_desc) 200 { 201 if (priv->sec_info.wapi_enabled && 202 has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY)) 203 return true; 204 return false; 205 } 206 207 /* 208 * This function checks if driver is configured with no security mode and 209 * scanned network is compatible with it. 210 */ 211 static bool 212 mwifiex_is_bss_no_sec(struct mwifiex_private *priv, 213 struct mwifiex_bssdescriptor *bss_desc) 214 { 215 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 216 !priv->sec_info.wpa2_enabled && 217 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 218 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 219 !priv->sec_info.encryption_mode && !bss_desc->privacy) { 220 return true; 221 } 222 return false; 223 } 224 225 /* 226 * This function checks if static WEP is enabled in driver and scanned network 227 * is compatible with it. 228 */ 229 static bool 230 mwifiex_is_bss_static_wep(struct mwifiex_private *priv, 231 struct mwifiex_bssdescriptor *bss_desc) 232 { 233 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 234 !priv->sec_info.wpa2_enabled && bss_desc->privacy) { 235 return true; 236 } 237 return false; 238 } 239 240 /* 241 * This function checks if wpa is enabled in driver and scanned network is 242 * compatible with it. 243 */ 244 static bool 245 mwifiex_is_bss_wpa(struct mwifiex_private *priv, 246 struct mwifiex_bssdescriptor *bss_desc) 247 { 248 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled && 249 !priv->sec_info.wpa2_enabled && 250 has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) 251 /* 252 * Privacy bit may NOT be set in some APs like 253 * LinkSys WRT54G && bss_desc->privacy 254 */ 255 ) { 256 dbg_security_flags(INFO, "WPA", priv, bss_desc); 257 return true; 258 } 259 return false; 260 } 261 262 /* 263 * This function checks if wpa2 is enabled in driver and scanned network is 264 * compatible with it. 265 */ 266 static bool 267 mwifiex_is_bss_wpa2(struct mwifiex_private *priv, 268 struct mwifiex_bssdescriptor *bss_desc) 269 { 270 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 271 priv->sec_info.wpa2_enabled && 272 has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 273 /* 274 * Privacy bit may NOT be set in some APs like 275 * LinkSys WRT54G && bss_desc->privacy 276 */ 277 dbg_security_flags(INFO, "WAP2", priv, bss_desc); 278 return true; 279 } 280 return false; 281 } 282 283 /* 284 * This function checks if adhoc AES is enabled in driver and scanned network is 285 * compatible with it. 286 */ 287 static bool 288 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv, 289 struct mwifiex_bssdescriptor *bss_desc) 290 { 291 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 292 !priv->sec_info.wpa2_enabled && 293 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 294 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 295 !priv->sec_info.encryption_mode && bss_desc->privacy) { 296 return true; 297 } 298 return false; 299 } 300 301 /* 302 * This function checks if dynamic WEP is enabled in driver and scanned network 303 * is compatible with it. 304 */ 305 static bool 306 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv, 307 struct mwifiex_bssdescriptor *bss_desc) 308 { 309 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 310 !priv->sec_info.wpa2_enabled && 311 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 312 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 313 priv->sec_info.encryption_mode && bss_desc->privacy) { 314 dbg_security_flags(INFO, "dynamic", priv, bss_desc); 315 return true; 316 } 317 return false; 318 } 319 320 /* 321 * This function checks if a scanned network is compatible with the driver 322 * settings. 323 * 324 * WEP WPA WPA2 ad-hoc encrypt Network 325 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible 326 * 0 0 0 0 NONE 0 0 0 yes No security 327 * 0 1 0 0 x 1x 1 x yes WPA (disable 328 * HT if no AES) 329 * 0 0 1 0 x 1x x 1 yes WPA2 (disable 330 * HT if no AES) 331 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES 332 * 1 0 0 0 NONE 1 0 0 yes Static WEP 333 * (disable HT) 334 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP 335 * 336 * Compatibility is not matched while roaming, except for mode. 337 */ 338 static s32 339 mwifiex_is_network_compatible(struct mwifiex_private *priv, 340 struct mwifiex_bssdescriptor *bss_desc, u32 mode) 341 { 342 struct mwifiex_adapter *adapter = priv->adapter; 343 344 bss_desc->disable_11n = false; 345 346 /* Don't check for compatibility if roaming */ 347 if (priv->media_connected && 348 (priv->bss_mode == NL80211_IFTYPE_STATION) && 349 (bss_desc->bss_mode == NL80211_IFTYPE_STATION)) 350 return 0; 351 352 if (priv->wps.session_enable) { 353 mwifiex_dbg(adapter, IOCTL, 354 "info: return success directly in WPS period\n"); 355 return 0; 356 } 357 358 if (bss_desc->chan_sw_ie_present) { 359 mwifiex_dbg(adapter, INFO, 360 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n"); 361 return -1; 362 } 363 364 if (mwifiex_is_bss_wapi(priv, bss_desc)) { 365 mwifiex_dbg(adapter, INFO, 366 "info: return success for WAPI AP\n"); 367 return 0; 368 } 369 370 if (bss_desc->bss_mode == mode) { 371 if (mwifiex_is_bss_no_sec(priv, bss_desc)) { 372 /* No security */ 373 return 0; 374 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) { 375 /* Static WEP enabled */ 376 mwifiex_dbg(adapter, INFO, 377 "info: Disable 11n in WEP mode.\n"); 378 bss_desc->disable_11n = true; 379 return 0; 380 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) { 381 /* WPA enabled */ 382 if (((priv->adapter->config_bands & BAND_GN || 383 priv->adapter->config_bands & BAND_AN) && 384 bss_desc->bcn_ht_cap) && 385 !mwifiex_is_wpa_oui_present(bss_desc, 386 CIPHER_SUITE_CCMP)) { 387 388 if (mwifiex_is_wpa_oui_present 389 (bss_desc, CIPHER_SUITE_TKIP)) { 390 mwifiex_dbg(adapter, INFO, 391 "info: Disable 11n if AES\t" 392 "is not supported by AP\n"); 393 bss_desc->disable_11n = true; 394 } else { 395 return -1; 396 } 397 } 398 return 0; 399 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) { 400 /* WPA2 enabled */ 401 if (((priv->adapter->config_bands & BAND_GN || 402 priv->adapter->config_bands & BAND_AN) && 403 bss_desc->bcn_ht_cap) && 404 !mwifiex_is_rsn_oui_present(bss_desc, 405 CIPHER_SUITE_CCMP)) { 406 407 if (mwifiex_is_rsn_oui_present 408 (bss_desc, CIPHER_SUITE_TKIP)) { 409 mwifiex_dbg(adapter, INFO, 410 "info: Disable 11n if AES\t" 411 "is not supported by AP\n"); 412 bss_desc->disable_11n = true; 413 } else { 414 return -1; 415 } 416 } 417 return 0; 418 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) { 419 /* Ad-hoc AES enabled */ 420 return 0; 421 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) { 422 /* Dynamic WEP enabled */ 423 return 0; 424 } 425 426 /* Security doesn't match */ 427 dbg_security_flags(ERROR, "failed", priv, bss_desc); 428 return -1; 429 } 430 431 /* Mode doesn't match */ 432 return -1; 433 } 434 435 /* 436 * This function creates a channel list for the driver to scan, based 437 * on region/band information. 438 * 439 * This routine is used for any scan that is not provided with a 440 * specific channel list to scan. 441 */ 442 static int 443 mwifiex_scan_create_channel_list(struct mwifiex_private *priv, 444 const struct mwifiex_user_scan_cfg 445 *user_scan_in, 446 struct mwifiex_chan_scan_param_set 447 *scan_chan_list, 448 u8 filtered_scan) 449 { 450 enum nl80211_band band; 451 struct ieee80211_supported_band *sband; 452 struct ieee80211_channel *ch; 453 struct mwifiex_adapter *adapter = priv->adapter; 454 int chan_idx = 0, i; 455 456 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) { 457 458 if (!priv->wdev.wiphy->bands[band]) 459 continue; 460 461 sband = priv->wdev.wiphy->bands[band]; 462 463 for (i = 0; (i < sband->n_channels) ; i++) { 464 ch = &sband->channels[i]; 465 if (ch->flags & IEEE80211_CHAN_DISABLED) 466 continue; 467 scan_chan_list[chan_idx].radio_type = band; 468 469 if (user_scan_in && 470 user_scan_in->chan_list[0].scan_time) 471 scan_chan_list[chan_idx].max_scan_time = 472 cpu_to_le16((u16) user_scan_in-> 473 chan_list[0].scan_time); 474 else if ((ch->flags & IEEE80211_CHAN_NO_IR) || 475 (ch->flags & IEEE80211_CHAN_RADAR)) 476 scan_chan_list[chan_idx].max_scan_time = 477 cpu_to_le16(adapter->passive_scan_time); 478 else 479 scan_chan_list[chan_idx].max_scan_time = 480 cpu_to_le16(adapter->active_scan_time); 481 482 if (ch->flags & IEEE80211_CHAN_NO_IR) 483 scan_chan_list[chan_idx].chan_scan_mode_bitmap 484 |= (MWIFIEX_PASSIVE_SCAN | 485 MWIFIEX_HIDDEN_SSID_REPORT); 486 else 487 scan_chan_list[chan_idx].chan_scan_mode_bitmap 488 &= ~MWIFIEX_PASSIVE_SCAN; 489 scan_chan_list[chan_idx].chan_number = 490 (u32) ch->hw_value; 491 492 scan_chan_list[chan_idx].chan_scan_mode_bitmap 493 |= MWIFIEX_DISABLE_CHAN_FILT; 494 495 if (filtered_scan && 496 !((ch->flags & IEEE80211_CHAN_NO_IR) || 497 (ch->flags & IEEE80211_CHAN_RADAR))) 498 scan_chan_list[chan_idx].max_scan_time = 499 cpu_to_le16(adapter->specific_scan_time); 500 501 chan_idx++; 502 } 503 504 } 505 return chan_idx; 506 } 507 508 /* This function creates a channel list tlv for bgscan config, based 509 * on region/band information. 510 */ 511 static int 512 mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv, 513 const struct mwifiex_bg_scan_cfg 514 *bgscan_cfg_in, 515 struct mwifiex_chan_scan_param_set 516 *scan_chan_list) 517 { 518 enum nl80211_band band; 519 struct ieee80211_supported_band *sband; 520 struct ieee80211_channel *ch; 521 struct mwifiex_adapter *adapter = priv->adapter; 522 int chan_idx = 0, i; 523 524 for (band = 0; (band < NUM_NL80211_BANDS); band++) { 525 if (!priv->wdev.wiphy->bands[band]) 526 continue; 527 528 sband = priv->wdev.wiphy->bands[band]; 529 530 for (i = 0; (i < sband->n_channels) ; i++) { 531 ch = &sband->channels[i]; 532 if (ch->flags & IEEE80211_CHAN_DISABLED) 533 continue; 534 scan_chan_list[chan_idx].radio_type = band; 535 536 if (bgscan_cfg_in->chan_list[0].scan_time) 537 scan_chan_list[chan_idx].max_scan_time = 538 cpu_to_le16((u16)bgscan_cfg_in-> 539 chan_list[0].scan_time); 540 else if (ch->flags & IEEE80211_CHAN_NO_IR) 541 scan_chan_list[chan_idx].max_scan_time = 542 cpu_to_le16(adapter->passive_scan_time); 543 else 544 scan_chan_list[chan_idx].max_scan_time = 545 cpu_to_le16(adapter-> 546 specific_scan_time); 547 548 if (ch->flags & IEEE80211_CHAN_NO_IR) 549 scan_chan_list[chan_idx].chan_scan_mode_bitmap 550 |= MWIFIEX_PASSIVE_SCAN; 551 else 552 scan_chan_list[chan_idx].chan_scan_mode_bitmap 553 &= ~MWIFIEX_PASSIVE_SCAN; 554 555 scan_chan_list[chan_idx].chan_number = 556 (u32)ch->hw_value; 557 chan_idx++; 558 } 559 } 560 return chan_idx; 561 } 562 563 /* This function appends rate TLV to scan config command. */ 564 static int 565 mwifiex_append_rate_tlv(struct mwifiex_private *priv, 566 struct mwifiex_scan_cmd_config *scan_cfg_out, 567 u8 radio) 568 { 569 struct mwifiex_ie_types_rates_param_set *rates_tlv; 570 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos; 571 u32 rates_size; 572 573 memset(rates, 0, sizeof(rates)); 574 575 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len; 576 577 if (priv->scan_request) 578 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates, 579 radio); 580 else 581 rates_size = mwifiex_get_supported_rates(priv, rates); 582 583 mwifiex_dbg(priv->adapter, CMD, 584 "info: SCAN_CMD: Rates size = %d\n", 585 rates_size); 586 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos; 587 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); 588 rates_tlv->header.len = cpu_to_le16((u16) rates_size); 589 memcpy(rates_tlv->rates, rates, rates_size); 590 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size; 591 592 return rates_size; 593 } 594 595 /* 596 * This function constructs and sends multiple scan config commands to 597 * the firmware. 598 * 599 * Previous routines in the code flow have created a scan command configuration 600 * with any requested TLVs. This function splits the channel TLV into maximum 601 * channels supported per scan lists and sends the portion of the channel TLV, 602 * along with the other TLVs, to the firmware. 603 */ 604 static int 605 mwifiex_scan_channel_list(struct mwifiex_private *priv, 606 u32 max_chan_per_scan, u8 filtered_scan, 607 struct mwifiex_scan_cmd_config *scan_cfg_out, 608 struct mwifiex_ie_types_chan_list_param_set 609 *chan_tlv_out, 610 struct mwifiex_chan_scan_param_set *scan_chan_list) 611 { 612 struct mwifiex_adapter *adapter = priv->adapter; 613 int ret = 0; 614 struct mwifiex_chan_scan_param_set *tmp_chan_list; 615 struct mwifiex_chan_scan_param_set *start_chan; 616 u32 tlv_idx, rates_size, cmd_no; 617 u32 total_scan_time; 618 u32 done_early; 619 u8 radio_type; 620 621 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { 622 mwifiex_dbg(priv->adapter, ERROR, 623 "info: Scan: Null detect: %p, %p, %p\n", 624 scan_cfg_out, chan_tlv_out, scan_chan_list); 625 return -1; 626 } 627 628 /* Check csa channel expiry before preparing scan list */ 629 mwifiex_11h_get_csa_closed_channel(priv); 630 631 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 632 633 /* Set the temp channel struct pointer to the start of the desired 634 list */ 635 tmp_chan_list = scan_chan_list; 636 637 /* Loop through the desired channel list, sending a new firmware scan 638 commands for each max_chan_per_scan channels (or for 1,6,11 639 individually if configured accordingly) */ 640 while (tmp_chan_list->chan_number) { 641 642 tlv_idx = 0; 643 total_scan_time = 0; 644 radio_type = 0; 645 chan_tlv_out->header.len = 0; 646 start_chan = tmp_chan_list; 647 done_early = false; 648 649 /* 650 * Construct the Channel TLV for the scan command. Continue to 651 * insert channel TLVs until: 652 * - the tlv_idx hits the maximum configured per scan command 653 * - the next channel to insert is 0 (end of desired channel 654 * list) 655 * - done_early is set (controlling individual scanning of 656 * 1,6,11) 657 */ 658 while (tlv_idx < max_chan_per_scan && 659 tmp_chan_list->chan_number && !done_early) { 660 661 if (tmp_chan_list->chan_number == priv->csa_chan) { 662 tmp_chan_list++; 663 continue; 664 } 665 666 radio_type = tmp_chan_list->radio_type; 667 mwifiex_dbg(priv->adapter, INFO, 668 "info: Scan: Chan(%3d), Radio(%d),\t" 669 "Mode(%d, %d), Dur(%d)\n", 670 tmp_chan_list->chan_number, 671 tmp_chan_list->radio_type, 672 tmp_chan_list->chan_scan_mode_bitmap 673 & MWIFIEX_PASSIVE_SCAN, 674 (tmp_chan_list->chan_scan_mode_bitmap 675 & MWIFIEX_DISABLE_CHAN_FILT) >> 1, 676 le16_to_cpu(tmp_chan_list->max_scan_time)); 677 678 /* Copy the current channel TLV to the command being 679 prepared */ 680 memcpy(chan_tlv_out->chan_scan_param + tlv_idx, 681 tmp_chan_list, 682 sizeof(chan_tlv_out->chan_scan_param)); 683 684 /* Increment the TLV header length by the size 685 appended */ 686 le16_unaligned_add_cpu(&chan_tlv_out->header.len, 687 sizeof( 688 chan_tlv_out->chan_scan_param)); 689 690 /* 691 * The tlv buffer length is set to the number of bytes 692 * of the between the channel tlv pointer and the start 693 * of the tlv buffer. This compensates for any TLVs 694 * that were appended before the channel list. 695 */ 696 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - 697 scan_cfg_out->tlv_buf); 698 699 /* Add the size of the channel tlv header and the data 700 length */ 701 scan_cfg_out->tlv_buf_len += 702 (sizeof(chan_tlv_out->header) 703 + le16_to_cpu(chan_tlv_out->header.len)); 704 705 /* Increment the index to the channel tlv we are 706 constructing */ 707 tlv_idx++; 708 709 /* Count the total scan time per command */ 710 total_scan_time += 711 le16_to_cpu(tmp_chan_list->max_scan_time); 712 713 done_early = false; 714 715 /* Stop the loop if the *current* channel is in the 716 1,6,11 set and we are not filtering on a BSSID 717 or SSID. */ 718 if (!filtered_scan && 719 (tmp_chan_list->chan_number == 1 || 720 tmp_chan_list->chan_number == 6 || 721 tmp_chan_list->chan_number == 11)) 722 done_early = true; 723 724 /* Increment the tmp pointer to the next channel to 725 be scanned */ 726 tmp_chan_list++; 727 728 /* Stop the loop if the *next* channel is in the 1,6,11 729 set. This will cause it to be the only channel 730 scanned on the next interation */ 731 if (!filtered_scan && 732 (tmp_chan_list->chan_number == 1 || 733 tmp_chan_list->chan_number == 6 || 734 tmp_chan_list->chan_number == 11)) 735 done_early = true; 736 } 737 738 /* The total scan time should be less than scan command timeout 739 value */ 740 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { 741 mwifiex_dbg(priv->adapter, ERROR, 742 "total scan time %dms\t" 743 "is over limit (%dms), scan skipped\n", 744 total_scan_time, 745 MWIFIEX_MAX_TOTAL_SCAN_TIME); 746 ret = -1; 747 break; 748 } 749 750 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out, 751 radio_type); 752 753 priv->adapter->scan_channels = start_chan; 754 755 /* Send the scan command to the firmware with the specified 756 cfg */ 757 if (priv->adapter->ext_scan) 758 cmd_no = HostCmd_CMD_802_11_SCAN_EXT; 759 else 760 cmd_no = HostCmd_CMD_802_11_SCAN; 761 762 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET, 763 0, scan_cfg_out, false); 764 765 /* rate IE is updated per scan command but same starting 766 * pointer is used each time so that rate IE from earlier 767 * scan_cfg_out->buf is overwritten with new one. 768 */ 769 scan_cfg_out->tlv_buf_len -= 770 sizeof(struct mwifiex_ie_types_header) + rates_size; 771 772 if (ret) { 773 mwifiex_cancel_pending_scan_cmd(adapter); 774 break; 775 } 776 } 777 778 if (ret) 779 return -1; 780 781 return 0; 782 } 783 784 /* 785 * This function constructs a scan command configuration structure to use 786 * in scan commands. 787 * 788 * Application layer or other functions can invoke network scanning 789 * with a scan configuration supplied in a user scan configuration structure. 790 * This structure is used as the basis of one or many scan command configuration 791 * commands that are sent to the command processing module and eventually to the 792 * firmware. 793 * 794 * This function creates a scan command configuration structure based on the 795 * following user supplied parameters (if present): 796 * - SSID filter 797 * - BSSID filter 798 * - Number of Probes to be sent 799 * - Channel list 800 * 801 * If the SSID or BSSID filter is not present, the filter is disabled/cleared. 802 * If the number of probes is not set, adapter default setting is used. 803 */ 804 static void 805 mwifiex_config_scan(struct mwifiex_private *priv, 806 const struct mwifiex_user_scan_cfg *user_scan_in, 807 struct mwifiex_scan_cmd_config *scan_cfg_out, 808 struct mwifiex_ie_types_chan_list_param_set **chan_list_out, 809 struct mwifiex_chan_scan_param_set *scan_chan_list, 810 u8 *max_chan_per_scan, u8 *filtered_scan, 811 u8 *scan_current_only) 812 { 813 struct mwifiex_adapter *adapter = priv->adapter; 814 struct mwifiex_ie_types_num_probes *num_probes_tlv; 815 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv; 816 struct mwifiex_ie_types_random_mac *random_mac_tlv; 817 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 818 struct mwifiex_ie_types_bssid_list *bssid_tlv; 819 u8 *tlv_pos; 820 u32 num_probes; 821 u32 ssid_len; 822 u32 chan_idx; 823 u32 scan_type; 824 u16 scan_dur; 825 u8 channel; 826 u8 radio_type; 827 int i; 828 u8 ssid_filter; 829 struct mwifiex_ie_types_htcap *ht_cap; 830 struct mwifiex_ie_types_bss_mode *bss_mode; 831 const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0}; 832 833 /* The tlv_buf_len is calculated for each scan command. The TLVs added 834 in this routine will be preserved since the routine that sends the 835 command will append channelTLVs at *chan_list_out. The difference 836 between the *chan_list_out and the tlv_buf start will be used to 837 calculate the size of anything we add in this routine. */ 838 scan_cfg_out->tlv_buf_len = 0; 839 840 /* Running tlv pointer. Assigned to chan_list_out at end of function 841 so later routines know where channels can be added to the command 842 buf */ 843 tlv_pos = scan_cfg_out->tlv_buf; 844 845 /* Initialize the scan as un-filtered; the flag is later set to TRUE 846 below if a SSID or BSSID filter is sent in the command */ 847 *filtered_scan = false; 848 849 /* Initialize the scan as not being only on the current channel. If 850 the channel list is customized, only contains one channel, and is 851 the active channel, this is set true and data flow is not halted. */ 852 *scan_current_only = false; 853 854 if (user_scan_in) { 855 u8 tmpaddr[ETH_ALEN]; 856 857 /* Default the ssid_filter flag to TRUE, set false under 858 certain wildcard conditions and qualified by the existence 859 of an SSID list before marking the scan as filtered */ 860 ssid_filter = true; 861 862 /* Set the BSS type scan filter, use Adapter setting if 863 unset */ 864 scan_cfg_out->bss_mode = 865 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode); 866 867 /* Set the number of probes to send, use Adapter setting 868 if unset */ 869 num_probes = user_scan_in->num_probes ?: adapter->scan_probes; 870 871 /* 872 * Set the BSSID filter to the incoming configuration, 873 * if non-zero. If not set, it will remain disabled 874 * (all zeros). 875 */ 876 memcpy(scan_cfg_out->specific_bssid, 877 user_scan_in->specific_bssid, 878 sizeof(scan_cfg_out->specific_bssid)); 879 880 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 881 882 if (adapter->ext_scan && 883 !is_zero_ether_addr(tmpaddr)) { 884 bssid_tlv = 885 (struct mwifiex_ie_types_bssid_list *)tlv_pos; 886 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID); 887 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN); 888 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid, 889 ETH_ALEN); 890 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list); 891 } 892 893 for (i = 0; i < user_scan_in->num_ssids; i++) { 894 ssid_len = user_scan_in->ssid_list[i].ssid_len; 895 896 wildcard_ssid_tlv = 897 (struct mwifiex_ie_types_wildcard_ssid_params *) 898 tlv_pos; 899 wildcard_ssid_tlv->header.type = 900 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 901 wildcard_ssid_tlv->header.len = cpu_to_le16( 902 (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> 903 max_ssid_length))); 904 905 /* 906 * max_ssid_length = 0 tells firmware to perform 907 * specific scan for the SSID filled, whereas 908 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 909 * wildcard scan. 910 */ 911 if (ssid_len) 912 wildcard_ssid_tlv->max_ssid_length = 0; 913 else 914 wildcard_ssid_tlv->max_ssid_length = 915 IEEE80211_MAX_SSID_LEN; 916 917 if (!memcmp(user_scan_in->ssid_list[i].ssid, 918 "DIRECT-", 7)) 919 wildcard_ssid_tlv->max_ssid_length = 0xfe; 920 921 memcpy(wildcard_ssid_tlv->ssid, 922 user_scan_in->ssid_list[i].ssid, ssid_len); 923 924 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 925 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 926 927 mwifiex_dbg(adapter, INFO, 928 "info: scan: ssid[%d]: %s, %d\n", 929 i, wildcard_ssid_tlv->ssid, 930 wildcard_ssid_tlv->max_ssid_length); 931 932 /* Empty wildcard ssid with a maxlen will match many or 933 potentially all SSIDs (maxlen == 32), therefore do 934 not treat the scan as 935 filtered. */ 936 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) 937 ssid_filter = false; 938 } 939 940 /* 941 * The default number of channels sent in the command is low to 942 * ensure the response buffer from the firmware does not 943 * truncate scan results. That is not an issue with an SSID 944 * or BSSID filter applied to the scan results in the firmware. 945 */ 946 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 947 if ((i && ssid_filter) || 948 !is_zero_ether_addr(tmpaddr)) 949 *filtered_scan = true; 950 951 if (user_scan_in->scan_chan_gap) { 952 mwifiex_dbg(adapter, INFO, 953 "info: scan: channel gap = %d\n", 954 user_scan_in->scan_chan_gap); 955 *max_chan_per_scan = 956 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 957 958 chan_gap_tlv = (void *)tlv_pos; 959 chan_gap_tlv->header.type = 960 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP); 961 chan_gap_tlv->header.len = 962 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap)); 963 chan_gap_tlv->chan_gap = 964 cpu_to_le16((user_scan_in->scan_chan_gap)); 965 tlv_pos += 966 sizeof(struct mwifiex_ie_types_scan_chan_gap); 967 } 968 969 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) { 970 random_mac_tlv = (void *)tlv_pos; 971 random_mac_tlv->header.type = 972 cpu_to_le16(TLV_TYPE_RANDOM_MAC); 973 random_mac_tlv->header.len = 974 cpu_to_le16(sizeof(random_mac_tlv->mac)); 975 ether_addr_copy(random_mac_tlv->mac, 976 user_scan_in->random_mac); 977 tlv_pos += 978 sizeof(struct mwifiex_ie_types_random_mac); 979 } 980 } else { 981 scan_cfg_out->bss_mode = (u8) adapter->scan_mode; 982 num_probes = adapter->scan_probes; 983 } 984 985 /* 986 * If a specific BSSID or SSID is used, the number of channels in the 987 * scan command will be increased to the absolute maximum. 988 */ 989 if (*filtered_scan) { 990 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 991 } else { 992 if (!priv->media_connected) 993 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD; 994 else 995 *max_chan_per_scan = 996 MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD / 2; 997 } 998 999 if (adapter->ext_scan) { 1000 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos; 1001 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE); 1002 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode)); 1003 bss_mode->bss_mode = scan_cfg_out->bss_mode; 1004 tlv_pos += sizeof(bss_mode->header) + 1005 le16_to_cpu(bss_mode->header.len); 1006 } 1007 1008 /* If the input config or adapter has the number of Probes set, 1009 add tlv */ 1010 if (num_probes) { 1011 1012 mwifiex_dbg(adapter, INFO, 1013 "info: scan: num_probes = %d\n", 1014 num_probes); 1015 1016 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; 1017 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 1018 num_probes_tlv->header.len = 1019 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 1020 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); 1021 1022 tlv_pos += sizeof(num_probes_tlv->header) + 1023 le16_to_cpu(num_probes_tlv->header.len); 1024 1025 } 1026 1027 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) && 1028 (priv->adapter->config_bands & BAND_GN || 1029 priv->adapter->config_bands & BAND_AN)) { 1030 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; 1031 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); 1032 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); 1033 ht_cap->header.len = 1034 cpu_to_le16(sizeof(struct ieee80211_ht_cap)); 1035 radio_type = 1036 mwifiex_band_to_radio_type(priv->adapter->config_bands); 1037 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap); 1038 tlv_pos += sizeof(struct mwifiex_ie_types_htcap); 1039 } 1040 1041 /* Append vendor specific IE TLV */ 1042 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); 1043 1044 /* 1045 * Set the output for the channel TLV to the address in the tlv buffer 1046 * past any TLVs that were added in this function (SSID, num_probes). 1047 * Channel TLVs will be added past this for each scan command, 1048 * preserving the TLVs that were previously added. 1049 */ 1050 *chan_list_out = 1051 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; 1052 1053 if (user_scan_in && user_scan_in->chan_list[0].chan_number) { 1054 1055 mwifiex_dbg(adapter, INFO, 1056 "info: Scan: Using supplied channel list\n"); 1057 1058 for (chan_idx = 0; 1059 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX && 1060 user_scan_in->chan_list[chan_idx].chan_number; 1061 chan_idx++) { 1062 1063 channel = user_scan_in->chan_list[chan_idx].chan_number; 1064 scan_chan_list[chan_idx].chan_number = channel; 1065 1066 radio_type = 1067 user_scan_in->chan_list[chan_idx].radio_type; 1068 scan_chan_list[chan_idx].radio_type = radio_type; 1069 1070 scan_type = user_scan_in->chan_list[chan_idx].scan_type; 1071 1072 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1073 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1074 |= (MWIFIEX_PASSIVE_SCAN | 1075 MWIFIEX_HIDDEN_SSID_REPORT); 1076 else 1077 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1078 &= ~MWIFIEX_PASSIVE_SCAN; 1079 1080 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1081 |= MWIFIEX_DISABLE_CHAN_FILT; 1082 1083 if (user_scan_in->chan_list[chan_idx].scan_time) { 1084 scan_dur = (u16) user_scan_in-> 1085 chan_list[chan_idx].scan_time; 1086 } else { 1087 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1088 scan_dur = adapter->passive_scan_time; 1089 else if (*filtered_scan) 1090 scan_dur = adapter->specific_scan_time; 1091 else 1092 scan_dur = adapter->active_scan_time; 1093 } 1094 1095 scan_chan_list[chan_idx].min_scan_time = 1096 cpu_to_le16(scan_dur); 1097 scan_chan_list[chan_idx].max_scan_time = 1098 cpu_to_le16(scan_dur); 1099 } 1100 1101 /* Check if we are only scanning the current channel */ 1102 if ((chan_idx == 1) && 1103 (user_scan_in->chan_list[0].chan_number == 1104 priv->curr_bss_params.bss_descriptor.channel)) { 1105 *scan_current_only = true; 1106 mwifiex_dbg(adapter, INFO, 1107 "info: Scan: Scanning current channel only\n"); 1108 } 1109 } else { 1110 mwifiex_dbg(adapter, INFO, 1111 "info: Scan: Creating full region channel list\n"); 1112 mwifiex_scan_create_channel_list(priv, user_scan_in, 1113 scan_chan_list, 1114 *filtered_scan); 1115 } 1116 1117 } 1118 1119 /* 1120 * This function inspects the scan response buffer for pointers to 1121 * expected TLVs. 1122 * 1123 * TLVs can be included at the end of the scan response BSS information. 1124 * 1125 * Data in the buffer is parsed pointers to TLVs that can potentially 1126 * be passed back in the response. 1127 */ 1128 static void 1129 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, 1130 struct mwifiex_ie_types_data *tlv, 1131 u32 tlv_buf_size, u32 req_tlv_type, 1132 struct mwifiex_ie_types_data **tlv_data) 1133 { 1134 struct mwifiex_ie_types_data *current_tlv; 1135 u32 tlv_buf_left; 1136 u32 tlv_type; 1137 u32 tlv_len; 1138 1139 current_tlv = tlv; 1140 tlv_buf_left = tlv_buf_size; 1141 *tlv_data = NULL; 1142 1143 mwifiex_dbg(adapter, INFO, 1144 "info: SCAN_RESP: tlv_buf_size = %d\n", 1145 tlv_buf_size); 1146 1147 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { 1148 1149 tlv_type = le16_to_cpu(current_tlv->header.type); 1150 tlv_len = le16_to_cpu(current_tlv->header.len); 1151 1152 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { 1153 mwifiex_dbg(adapter, ERROR, 1154 "SCAN_RESP: TLV buffer corrupt\n"); 1155 break; 1156 } 1157 1158 if (req_tlv_type == tlv_type) { 1159 switch (tlv_type) { 1160 case TLV_TYPE_TSFTIMESTAMP: 1161 mwifiex_dbg(adapter, INFO, 1162 "info: SCAN_RESP: TSF\t" 1163 "timestamp TLV, len = %d\n", 1164 tlv_len); 1165 *tlv_data = current_tlv; 1166 break; 1167 case TLV_TYPE_CHANNELBANDLIST: 1168 mwifiex_dbg(adapter, INFO, 1169 "info: SCAN_RESP: channel\t" 1170 "band list TLV, len = %d\n", 1171 tlv_len); 1172 *tlv_data = current_tlv; 1173 break; 1174 default: 1175 mwifiex_dbg(adapter, ERROR, 1176 "SCAN_RESP: unhandled TLV = %d\n", 1177 tlv_type); 1178 /* Give up, this seems corrupted */ 1179 return; 1180 } 1181 } 1182 1183 if (*tlv_data) 1184 break; 1185 1186 1187 tlv_buf_left -= (sizeof(tlv->header) + tlv_len); 1188 current_tlv = 1189 (struct mwifiex_ie_types_data *) (current_tlv->data + 1190 tlv_len); 1191 1192 } /* while */ 1193 } 1194 1195 /* 1196 * This function parses provided beacon buffer and updates 1197 * respective fields in bss descriptor structure. 1198 */ 1199 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1200 struct mwifiex_bssdescriptor *bss_entry) 1201 { 1202 u8 element_id; 1203 struct ieee_types_fh_param_set *fh_param_set; 1204 struct ieee_types_ds_param_set *ds_param_set; 1205 struct ieee_types_cf_param_set *cf_param_set; 1206 struct ieee_types_ibss_param_set *ibss_param_set; 1207 u8 *current_ptr; 1208 u8 *rate; 1209 u8 element_len; 1210 u16 total_ie_len; 1211 u8 bytes_to_copy; 1212 u8 rate_size; 1213 u8 found_data_rate_ie; 1214 u32 bytes_left; 1215 struct ieee_types_vendor_specific *vendor_ie; 1216 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1217 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1218 1219 found_data_rate_ie = false; 1220 rate_size = 0; 1221 current_ptr = bss_entry->beacon_buf; 1222 bytes_left = bss_entry->beacon_buf_size; 1223 1224 /* Process variable IE */ 1225 while (bytes_left >= 2) { 1226 element_id = *current_ptr; 1227 element_len = *(current_ptr + 1); 1228 total_ie_len = element_len + sizeof(struct ieee_types_header); 1229 1230 if (bytes_left < total_ie_len) { 1231 mwifiex_dbg(adapter, ERROR, 1232 "err: InterpretIE: in processing\t" 1233 "IE, bytes left < IE length\n"); 1234 return -EINVAL; 1235 } 1236 switch (element_id) { 1237 case WLAN_EID_SSID: 1238 if (element_len > IEEE80211_MAX_SSID_LEN) 1239 return -EINVAL; 1240 bss_entry->ssid.ssid_len = element_len; 1241 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1242 element_len); 1243 mwifiex_dbg(adapter, INFO, 1244 "info: InterpretIE: ssid: %-32s\n", 1245 bss_entry->ssid.ssid); 1246 break; 1247 1248 case WLAN_EID_SUPP_RATES: 1249 if (element_len > MWIFIEX_SUPPORTED_RATES) 1250 return -EINVAL; 1251 memcpy(bss_entry->data_rates, current_ptr + 2, 1252 element_len); 1253 memcpy(bss_entry->supported_rates, current_ptr + 2, 1254 element_len); 1255 rate_size = element_len; 1256 found_data_rate_ie = true; 1257 break; 1258 1259 case WLAN_EID_FH_PARAMS: 1260 if (total_ie_len < sizeof(*fh_param_set)) 1261 return -EINVAL; 1262 fh_param_set = 1263 (struct ieee_types_fh_param_set *) current_ptr; 1264 memcpy(&bss_entry->phy_param_set.fh_param_set, 1265 fh_param_set, 1266 sizeof(struct ieee_types_fh_param_set)); 1267 break; 1268 1269 case WLAN_EID_DS_PARAMS: 1270 if (total_ie_len < sizeof(*ds_param_set)) 1271 return -EINVAL; 1272 ds_param_set = 1273 (struct ieee_types_ds_param_set *) current_ptr; 1274 1275 bss_entry->channel = ds_param_set->current_chan; 1276 1277 memcpy(&bss_entry->phy_param_set.ds_param_set, 1278 ds_param_set, 1279 sizeof(struct ieee_types_ds_param_set)); 1280 break; 1281 1282 case WLAN_EID_CF_PARAMS: 1283 if (total_ie_len < sizeof(*cf_param_set)) 1284 return -EINVAL; 1285 cf_param_set = 1286 (struct ieee_types_cf_param_set *) current_ptr; 1287 memcpy(&bss_entry->ss_param_set.cf_param_set, 1288 cf_param_set, 1289 sizeof(struct ieee_types_cf_param_set)); 1290 break; 1291 1292 case WLAN_EID_IBSS_PARAMS: 1293 if (total_ie_len < sizeof(*ibss_param_set)) 1294 return -EINVAL; 1295 ibss_param_set = 1296 (struct ieee_types_ibss_param_set *) 1297 current_ptr; 1298 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1299 ibss_param_set, 1300 sizeof(struct ieee_types_ibss_param_set)); 1301 break; 1302 1303 case WLAN_EID_ERP_INFO: 1304 if (!element_len) 1305 return -EINVAL; 1306 bss_entry->erp_flags = *(current_ptr + 2); 1307 break; 1308 1309 case WLAN_EID_PWR_CONSTRAINT: 1310 if (!element_len) 1311 return -EINVAL; 1312 bss_entry->local_constraint = *(current_ptr + 2); 1313 bss_entry->sensed_11h = true; 1314 break; 1315 1316 case WLAN_EID_CHANNEL_SWITCH: 1317 bss_entry->chan_sw_ie_present = true; 1318 fallthrough; 1319 case WLAN_EID_PWR_CAPABILITY: 1320 case WLAN_EID_TPC_REPORT: 1321 case WLAN_EID_QUIET: 1322 bss_entry->sensed_11h = true; 1323 break; 1324 1325 case WLAN_EID_EXT_SUPP_RATES: 1326 /* 1327 * Only process extended supported rate 1328 * if data rate is already found. 1329 * Data rate IE should come before 1330 * extended supported rate IE 1331 */ 1332 if (found_data_rate_ie) { 1333 if ((element_len + rate_size) > 1334 MWIFIEX_SUPPORTED_RATES) 1335 bytes_to_copy = 1336 (MWIFIEX_SUPPORTED_RATES - 1337 rate_size); 1338 else 1339 bytes_to_copy = element_len; 1340 1341 rate = (u8 *) bss_entry->data_rates; 1342 rate += rate_size; 1343 memcpy(rate, current_ptr + 2, bytes_to_copy); 1344 1345 rate = (u8 *) bss_entry->supported_rates; 1346 rate += rate_size; 1347 memcpy(rate, current_ptr + 2, bytes_to_copy); 1348 } 1349 break; 1350 1351 case WLAN_EID_VENDOR_SPECIFIC: 1352 vendor_ie = (struct ieee_types_vendor_specific *) 1353 current_ptr; 1354 1355 /* 802.11 requires at least 3-byte OUI. */ 1356 if (element_len < sizeof(vendor_ie->vend_hdr.oui.oui)) 1357 return -EINVAL; 1358 1359 /* Not long enough for a match? Skip it. */ 1360 if (element_len < sizeof(wpa_oui)) 1361 break; 1362 1363 if (!memcmp(&vendor_ie->vend_hdr.oui, wpa_oui, 1364 sizeof(wpa_oui))) { 1365 bss_entry->bcn_wpa_ie = 1366 (struct ieee_types_vendor_specific *) 1367 current_ptr; 1368 bss_entry->wpa_offset = (u16) 1369 (current_ptr - bss_entry->beacon_buf); 1370 } else if (!memcmp(&vendor_ie->vend_hdr.oui, wmm_oui, 1371 sizeof(wmm_oui))) { 1372 if (total_ie_len == 1373 sizeof(struct ieee_types_wmm_parameter) || 1374 total_ie_len == 1375 sizeof(struct ieee_types_wmm_info)) 1376 /* 1377 * Only accept and copy the WMM IE if 1378 * it matches the size expected for the 1379 * WMM Info IE or the WMM Parameter IE. 1380 */ 1381 memcpy((u8 *) &bss_entry->wmm_ie, 1382 current_ptr, total_ie_len); 1383 } 1384 break; 1385 case WLAN_EID_RSN: 1386 bss_entry->bcn_rsn_ie = 1387 (struct ieee_types_generic *) current_ptr; 1388 bss_entry->rsn_offset = (u16) (current_ptr - 1389 bss_entry->beacon_buf); 1390 break; 1391 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1392 bss_entry->bcn_wapi_ie = 1393 (struct ieee_types_generic *) current_ptr; 1394 bss_entry->wapi_offset = (u16) (current_ptr - 1395 bss_entry->beacon_buf); 1396 break; 1397 case WLAN_EID_HT_CAPABILITY: 1398 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1399 (current_ptr + 1400 sizeof(struct ieee_types_header)); 1401 bss_entry->ht_cap_offset = (u16) (current_ptr + 1402 sizeof(struct ieee_types_header) - 1403 bss_entry->beacon_buf); 1404 break; 1405 case WLAN_EID_HT_OPERATION: 1406 bss_entry->bcn_ht_oper = 1407 (struct ieee80211_ht_operation *)(current_ptr + 1408 sizeof(struct ieee_types_header)); 1409 bss_entry->ht_info_offset = (u16) (current_ptr + 1410 sizeof(struct ieee_types_header) - 1411 bss_entry->beacon_buf); 1412 break; 1413 case WLAN_EID_VHT_CAPABILITY: 1414 bss_entry->disable_11ac = false; 1415 bss_entry->bcn_vht_cap = 1416 (void *)(current_ptr + 1417 sizeof(struct ieee_types_header)); 1418 bss_entry->vht_cap_offset = 1419 (u16)((u8 *)bss_entry->bcn_vht_cap - 1420 bss_entry->beacon_buf); 1421 break; 1422 case WLAN_EID_VHT_OPERATION: 1423 bss_entry->bcn_vht_oper = 1424 (void *)(current_ptr + 1425 sizeof(struct ieee_types_header)); 1426 bss_entry->vht_info_offset = 1427 (u16)((u8 *)bss_entry->bcn_vht_oper - 1428 bss_entry->beacon_buf); 1429 break; 1430 case WLAN_EID_BSS_COEX_2040: 1431 bss_entry->bcn_bss_co_2040 = current_ptr; 1432 bss_entry->bss_co_2040_offset = 1433 (u16) (current_ptr - bss_entry->beacon_buf); 1434 break; 1435 case WLAN_EID_EXT_CAPABILITY: 1436 bss_entry->bcn_ext_cap = current_ptr; 1437 bss_entry->ext_cap_offset = 1438 (u16) (current_ptr - bss_entry->beacon_buf); 1439 break; 1440 case WLAN_EID_OPMODE_NOTIF: 1441 bss_entry->oper_mode = (void *)current_ptr; 1442 bss_entry->oper_mode_offset = 1443 (u16)((u8 *)bss_entry->oper_mode - 1444 bss_entry->beacon_buf); 1445 break; 1446 default: 1447 break; 1448 } 1449 1450 current_ptr += total_ie_len; 1451 bytes_left -= total_ie_len; 1452 1453 } /* while (bytes_left > 2) */ 1454 return 0; 1455 } 1456 1457 /* 1458 * This function converts radio type scan parameter to a band configuration 1459 * to be used in join command. 1460 */ 1461 static u8 1462 mwifiex_radio_type_to_band(u8 radio_type) 1463 { 1464 switch (radio_type) { 1465 case HostCmd_SCAN_RADIO_TYPE_A: 1466 return BAND_A; 1467 case HostCmd_SCAN_RADIO_TYPE_BG: 1468 default: 1469 return BAND_G; 1470 } 1471 } 1472 1473 /* 1474 * This is an internal function used to start a scan based on an input 1475 * configuration. 1476 * 1477 * This uses the input user scan configuration information when provided in 1478 * order to send the appropriate scan commands to firmware to populate or 1479 * update the internal driver scan table. 1480 */ 1481 int mwifiex_scan_networks(struct mwifiex_private *priv, 1482 const struct mwifiex_user_scan_cfg *user_scan_in) 1483 { 1484 int ret; 1485 struct mwifiex_adapter *adapter = priv->adapter; 1486 struct cmd_ctrl_node *cmd_node; 1487 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1488 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1489 struct mwifiex_chan_scan_param_set *scan_chan_list; 1490 u8 filtered_scan; 1491 u8 scan_current_chan_only; 1492 u8 max_chan_per_scan; 1493 1494 if (adapter->scan_processing) { 1495 mwifiex_dbg(adapter, WARN, 1496 "cmd: Scan already in process...\n"); 1497 return -EBUSY; 1498 } 1499 1500 if (priv->scan_block) { 1501 mwifiex_dbg(adapter, WARN, 1502 "cmd: Scan is blocked during association...\n"); 1503 return -EBUSY; 1504 } 1505 1506 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags) || 1507 test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags)) { 1508 mwifiex_dbg(adapter, ERROR, 1509 "Ignore scan. Card removed or firmware in bad state\n"); 1510 return -EFAULT; 1511 } 1512 1513 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1514 adapter->scan_processing = true; 1515 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1516 1517 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1518 GFP_KERNEL); 1519 if (!scan_cfg_out) { 1520 ret = -ENOMEM; 1521 goto done; 1522 } 1523 1524 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX, 1525 sizeof(struct mwifiex_chan_scan_param_set), 1526 GFP_KERNEL); 1527 if (!scan_chan_list) { 1528 kfree(scan_cfg_out); 1529 ret = -ENOMEM; 1530 goto done; 1531 } 1532 1533 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1534 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1535 &filtered_scan, &scan_current_chan_only); 1536 1537 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1538 &scan_cfg_out->config, chan_list_out, 1539 scan_chan_list); 1540 1541 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1542 if (!ret) { 1543 spin_lock_bh(&adapter->scan_pending_q_lock); 1544 if (!list_empty(&adapter->scan_pending_q)) { 1545 cmd_node = list_first_entry(&adapter->scan_pending_q, 1546 struct cmd_ctrl_node, list); 1547 list_del(&cmd_node->list); 1548 spin_unlock_bh(&adapter->scan_pending_q_lock); 1549 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 1550 queue_work(adapter->workqueue, &adapter->main_work); 1551 1552 /* Perform internal scan synchronously */ 1553 if (!priv->scan_request) { 1554 mwifiex_dbg(adapter, INFO, 1555 "wait internal scan\n"); 1556 mwifiex_wait_queue_complete(adapter, cmd_node); 1557 } 1558 } else { 1559 spin_unlock_bh(&adapter->scan_pending_q_lock); 1560 } 1561 } 1562 1563 kfree(scan_cfg_out); 1564 kfree(scan_chan_list); 1565 done: 1566 if (ret) { 1567 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1568 adapter->scan_processing = false; 1569 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1570 } 1571 return ret; 1572 } 1573 1574 /* 1575 * This function prepares a scan command to be sent to the firmware. 1576 * 1577 * This uses the scan command configuration sent to the command processing 1578 * module in command preparation stage to configure a scan command structure 1579 * to send to firmware. 1580 * 1581 * The fixed fields specifying the BSS type and BSSID filters as well as a 1582 * variable number/length of TLVs are sent in the command to firmware. 1583 * 1584 * Preparation also includes - 1585 * - Setting command ID, and proper size 1586 * - Ensuring correct endian-ness 1587 */ 1588 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1589 struct mwifiex_scan_cmd_config *scan_cfg) 1590 { 1591 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1592 1593 /* Set fixed field variables in scan command */ 1594 scan_cmd->bss_mode = scan_cfg->bss_mode; 1595 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1596 sizeof(scan_cmd->bssid)); 1597 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1598 1599 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1600 1601 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1602 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1603 + sizeof(scan_cmd->bssid) 1604 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1605 1606 return 0; 1607 } 1608 1609 /* 1610 * This function checks compatibility of requested network with current 1611 * driver settings. 1612 */ 1613 int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1614 struct mwifiex_bssdescriptor *bss_desc) 1615 { 1616 int ret = -1; 1617 1618 if (!bss_desc) 1619 return -1; 1620 1621 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1622 (u16) bss_desc->channel, 0))) { 1623 switch (priv->bss_mode) { 1624 case NL80211_IFTYPE_STATION: 1625 case NL80211_IFTYPE_ADHOC: 1626 ret = mwifiex_is_network_compatible(priv, bss_desc, 1627 priv->bss_mode); 1628 if (ret) 1629 mwifiex_dbg(priv->adapter, ERROR, 1630 "Incompatible network settings\n"); 1631 break; 1632 default: 1633 ret = 0; 1634 } 1635 } 1636 1637 return ret; 1638 } 1639 1640 /* This function checks if SSID string contains all zeroes or length is zero */ 1641 static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) 1642 { 1643 int idx; 1644 1645 for (idx = 0; idx < ssid->ssid_len; idx++) { 1646 if (ssid->ssid[idx]) 1647 return false; 1648 } 1649 1650 return true; 1651 } 1652 1653 /* This function checks if any hidden SSID found in passive scan channels 1654 * and save those channels for specific SSID active scan 1655 */ 1656 static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, 1657 struct cfg80211_bss *bss) 1658 { 1659 struct mwifiex_bssdescriptor *bss_desc; 1660 int ret; 1661 int chid; 1662 1663 /* Allocate and fill new bss descriptor */ 1664 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); 1665 if (!bss_desc) 1666 return -ENOMEM; 1667 1668 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1669 if (ret) 1670 goto done; 1671 1672 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { 1673 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); 1674 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { 1675 if (priv->hidden_chan[chid].chan_number == 1676 bss->channel->hw_value) 1677 break; 1678 1679 if (!priv->hidden_chan[chid].chan_number) { 1680 priv->hidden_chan[chid].chan_number = 1681 bss->channel->hw_value; 1682 priv->hidden_chan[chid].radio_type = 1683 bss->channel->band; 1684 priv->hidden_chan[chid].scan_type = 1685 MWIFIEX_SCAN_TYPE_ACTIVE; 1686 break; 1687 } 1688 } 1689 } 1690 1691 done: 1692 /* beacon_ie buffer was allocated in function 1693 * mwifiex_fill_new_bss_desc(). Free it now. 1694 */ 1695 kfree(bss_desc->beacon_buf); 1696 kfree(bss_desc); 1697 return 0; 1698 } 1699 1700 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, 1701 struct cfg80211_bss *bss) 1702 { 1703 struct mwifiex_bssdescriptor *bss_desc; 1704 int ret; 1705 1706 /* Allocate and fill new bss descriptor */ 1707 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL); 1708 if (!bss_desc) 1709 return -ENOMEM; 1710 1711 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1712 if (ret) 1713 goto done; 1714 1715 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1716 if (ret) 1717 goto done; 1718 1719 spin_lock_bh(&priv->curr_bcn_buf_lock); 1720 /* Make a copy of current BSSID descriptor */ 1721 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1722 sizeof(priv->curr_bss_params.bss_descriptor)); 1723 1724 /* The contents of beacon_ie will be copied to its own buffer 1725 * in mwifiex_save_curr_bcn() 1726 */ 1727 mwifiex_save_curr_bcn(priv); 1728 spin_unlock_bh(&priv->curr_bcn_buf_lock); 1729 1730 done: 1731 /* beacon_ie buffer was allocated in function 1732 * mwifiex_fill_new_bss_desc(). Free it now. 1733 */ 1734 kfree(bss_desc->beacon_buf); 1735 kfree(bss_desc); 1736 return 0; 1737 } 1738 1739 static int 1740 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, 1741 u32 *bytes_left, u64 fw_tsf, u8 *radio_type, 1742 bool ext_scan, s32 rssi_val) 1743 { 1744 struct mwifiex_adapter *adapter = priv->adapter; 1745 struct mwifiex_chan_freq_power *cfp; 1746 struct cfg80211_bss *bss; 1747 u8 bssid[ETH_ALEN]; 1748 s32 rssi; 1749 const u8 *ie_buf; 1750 size_t ie_len; 1751 u16 channel = 0; 1752 u16 beacon_size = 0; 1753 u32 curr_bcn_bytes; 1754 u32 freq; 1755 u16 beacon_period; 1756 u16 cap_info_bitmap; 1757 u8 *current_ptr; 1758 u64 timestamp; 1759 struct mwifiex_fixed_bcn_param *bcn_param; 1760 struct mwifiex_bss_priv *bss_priv; 1761 1762 if (*bytes_left >= sizeof(beacon_size)) { 1763 /* Extract & convert beacon size from command buffer */ 1764 beacon_size = get_unaligned_le16((*bss_info)); 1765 *bytes_left -= sizeof(beacon_size); 1766 *bss_info += sizeof(beacon_size); 1767 } 1768 1769 if (!beacon_size || beacon_size > *bytes_left) { 1770 *bss_info += *bytes_left; 1771 *bytes_left = 0; 1772 return -EFAULT; 1773 } 1774 1775 /* Initialize the current working beacon pointer for this BSS 1776 * iteration 1777 */ 1778 current_ptr = *bss_info; 1779 1780 /* Advance the return beacon pointer past the current beacon */ 1781 *bss_info += beacon_size; 1782 *bytes_left -= beacon_size; 1783 1784 curr_bcn_bytes = beacon_size; 1785 1786 /* First 5 fields are bssid, RSSI(for legacy scan only), 1787 * time stamp, beacon interval, and capability information 1788 */ 1789 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) + 1790 sizeof(struct mwifiex_fixed_bcn_param)) { 1791 mwifiex_dbg(adapter, ERROR, 1792 "InterpretIE: not enough bytes left\n"); 1793 return -EFAULT; 1794 } 1795 1796 memcpy(bssid, current_ptr, ETH_ALEN); 1797 current_ptr += ETH_ALEN; 1798 curr_bcn_bytes -= ETH_ALEN; 1799 1800 if (!ext_scan) { 1801 rssi = (s32) *current_ptr; 1802 rssi = (-rssi) * 100; /* Convert dBm to mBm */ 1803 current_ptr += sizeof(u8); 1804 curr_bcn_bytes -= sizeof(u8); 1805 mwifiex_dbg(adapter, INFO, 1806 "info: InterpretIE: RSSI=%d\n", rssi); 1807 } else { 1808 rssi = rssi_val; 1809 } 1810 1811 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr; 1812 current_ptr += sizeof(*bcn_param); 1813 curr_bcn_bytes -= sizeof(*bcn_param); 1814 1815 timestamp = le64_to_cpu(bcn_param->timestamp); 1816 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1817 1818 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1819 mwifiex_dbg(adapter, INFO, 1820 "info: InterpretIE: capabilities=0x%X\n", 1821 cap_info_bitmap); 1822 1823 /* Rest of the current buffer are IE's */ 1824 ie_buf = current_ptr; 1825 ie_len = curr_bcn_bytes; 1826 mwifiex_dbg(adapter, INFO, 1827 "info: InterpretIE: IELength for this AP = %d\n", 1828 curr_bcn_bytes); 1829 1830 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1831 u8 element_id, element_len; 1832 1833 element_id = *current_ptr; 1834 element_len = *(current_ptr + 1); 1835 if (curr_bcn_bytes < element_len + 1836 sizeof(struct ieee_types_header)) { 1837 mwifiex_dbg(adapter, ERROR, 1838 "%s: bytes left < IE length\n", __func__); 1839 return -EFAULT; 1840 } 1841 if (element_id == WLAN_EID_DS_PARAMS) { 1842 channel = *(current_ptr + 1843 sizeof(struct ieee_types_header)); 1844 break; 1845 } 1846 1847 current_ptr += element_len + sizeof(struct ieee_types_header); 1848 curr_bcn_bytes -= element_len + 1849 sizeof(struct ieee_types_header); 1850 } 1851 1852 if (channel) { 1853 struct ieee80211_channel *chan; 1854 u8 band; 1855 1856 /* Skip entry if on csa closed channel */ 1857 if (channel == priv->csa_chan) { 1858 mwifiex_dbg(adapter, WARN, 1859 "Dropping entry on csa closed channel\n"); 1860 return 0; 1861 } 1862 1863 band = BAND_G; 1864 if (radio_type) 1865 band = mwifiex_radio_type_to_band(*radio_type & 1866 (BIT(0) | BIT(1))); 1867 1868 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1869 1870 freq = cfp ? cfp->freq : 0; 1871 1872 chan = ieee80211_get_channel(priv->wdev.wiphy, freq); 1873 1874 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1875 bss = cfg80211_inform_bss(priv->wdev.wiphy, 1876 chan, CFG80211_BSS_FTYPE_UNKNOWN, 1877 bssid, timestamp, 1878 cap_info_bitmap, beacon_period, 1879 ie_buf, ie_len, rssi, GFP_ATOMIC); 1880 if (bss) { 1881 bss_priv = (struct mwifiex_bss_priv *)bss->priv; 1882 bss_priv->band = band; 1883 bss_priv->fw_tsf = fw_tsf; 1884 if (priv->media_connected && 1885 !memcmp(bssid, priv->curr_bss_params. 1886 bss_descriptor.mac_address, 1887 ETH_ALEN)) 1888 mwifiex_update_curr_bss_params(priv, 1889 bss); 1890 1891 if ((chan->flags & IEEE80211_CHAN_RADAR) || 1892 (chan->flags & IEEE80211_CHAN_NO_IR)) { 1893 mwifiex_dbg(adapter, INFO, 1894 "radar or passive channel %d\n", 1895 channel); 1896 mwifiex_save_hidden_ssid_channels(priv, 1897 bss); 1898 } 1899 1900 cfg80211_put_bss(priv->wdev.wiphy, bss); 1901 } 1902 } 1903 } else { 1904 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); 1905 } 1906 1907 return 0; 1908 } 1909 1910 static void mwifiex_complete_scan(struct mwifiex_private *priv) 1911 { 1912 struct mwifiex_adapter *adapter = priv->adapter; 1913 1914 adapter->survey_idx = 0; 1915 if (adapter->curr_cmd->wait_q_enabled) { 1916 adapter->cmd_wait_q.status = 0; 1917 if (!priv->scan_request) { 1918 mwifiex_dbg(adapter, INFO, 1919 "complete internal scan\n"); 1920 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1921 } 1922 } 1923 } 1924 1925 /* This function checks if any hidden SSID found in passive scan channels 1926 * and do specific SSID active scan for those channels 1927 */ 1928 static int 1929 mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) 1930 { 1931 int ret; 1932 struct mwifiex_adapter *adapter = priv->adapter; 1933 u8 id = 0; 1934 struct mwifiex_user_scan_cfg *user_scan_cfg; 1935 1936 if (adapter->active_scan_triggered || !priv->scan_request || 1937 priv->scan_aborting) { 1938 adapter->active_scan_triggered = false; 1939 return 0; 1940 } 1941 1942 if (!priv->hidden_chan[0].chan_number) { 1943 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); 1944 return 0; 1945 } 1946 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); 1947 1948 if (!user_scan_cfg) 1949 return -ENOMEM; 1950 1951 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { 1952 if (!priv->hidden_chan[id].chan_number) 1953 break; 1954 memcpy(&user_scan_cfg->chan_list[id], 1955 &priv->hidden_chan[id], 1956 sizeof(struct mwifiex_user_scan_chan)); 1957 } 1958 1959 adapter->active_scan_triggered = true; 1960 if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) 1961 ether_addr_copy(user_scan_cfg->random_mac, 1962 priv->scan_request->mac_addr); 1963 user_scan_cfg->num_ssids = priv->scan_request->n_ssids; 1964 user_scan_cfg->ssid_list = priv->scan_request->ssids; 1965 1966 ret = mwifiex_scan_networks(priv, user_scan_cfg); 1967 kfree(user_scan_cfg); 1968 1969 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); 1970 1971 if (ret) { 1972 dev_err(priv->adapter->dev, "scan failed: %d\n", ret); 1973 return ret; 1974 } 1975 1976 return 0; 1977 } 1978 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) 1979 { 1980 struct mwifiex_adapter *adapter = priv->adapter; 1981 struct cmd_ctrl_node *cmd_node; 1982 1983 spin_lock_bh(&adapter->scan_pending_q_lock); 1984 if (list_empty(&adapter->scan_pending_q)) { 1985 spin_unlock_bh(&adapter->scan_pending_q_lock); 1986 1987 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1988 adapter->scan_processing = false; 1989 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1990 1991 mwifiex_active_scan_req_for_passive_chan(priv); 1992 1993 if (!adapter->ext_scan) 1994 mwifiex_complete_scan(priv); 1995 1996 if (priv->scan_request) { 1997 struct cfg80211_scan_info info = { 1998 .aborted = false, 1999 }; 2000 2001 mwifiex_dbg(adapter, INFO, 2002 "info: notifying scan done\n"); 2003 cfg80211_scan_done(priv->scan_request, &info); 2004 priv->scan_request = NULL; 2005 priv->scan_aborting = false; 2006 } else { 2007 priv->scan_aborting = false; 2008 mwifiex_dbg(adapter, INFO, 2009 "info: scan already aborted\n"); 2010 } 2011 } else if ((priv->scan_aborting && !priv->scan_request) || 2012 priv->scan_block) { 2013 spin_unlock_bh(&adapter->scan_pending_q_lock); 2014 2015 mwifiex_cancel_pending_scan_cmd(adapter); 2016 2017 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2018 adapter->scan_processing = false; 2019 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2020 2021 if (!adapter->active_scan_triggered) { 2022 if (priv->scan_request) { 2023 struct cfg80211_scan_info info = { 2024 .aborted = true, 2025 }; 2026 2027 mwifiex_dbg(adapter, INFO, 2028 "info: aborting scan\n"); 2029 cfg80211_scan_done(priv->scan_request, &info); 2030 priv->scan_request = NULL; 2031 priv->scan_aborting = false; 2032 } else { 2033 priv->scan_aborting = false; 2034 mwifiex_dbg(adapter, INFO, 2035 "info: scan already aborted\n"); 2036 } 2037 } 2038 } else { 2039 /* Get scan command from scan_pending_q and put to 2040 * cmd_pending_q 2041 */ 2042 cmd_node = list_first_entry(&adapter->scan_pending_q, 2043 struct cmd_ctrl_node, list); 2044 list_del(&cmd_node->list); 2045 spin_unlock_bh(&adapter->scan_pending_q_lock); 2046 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 2047 } 2048 2049 return; 2050 } 2051 2052 void mwifiex_cancel_scan(struct mwifiex_adapter *adapter) 2053 { 2054 struct mwifiex_private *priv; 2055 int i; 2056 2057 mwifiex_cancel_pending_scan_cmd(adapter); 2058 2059 if (adapter->scan_processing) { 2060 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2061 adapter->scan_processing = false; 2062 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2063 for (i = 0; i < adapter->priv_num; i++) { 2064 priv = adapter->priv[i]; 2065 if (!priv) 2066 continue; 2067 if (priv->scan_request) { 2068 struct cfg80211_scan_info info = { 2069 .aborted = true, 2070 }; 2071 2072 mwifiex_dbg(adapter, INFO, 2073 "info: aborting scan\n"); 2074 cfg80211_scan_done(priv->scan_request, &info); 2075 priv->scan_request = NULL; 2076 priv->scan_aborting = false; 2077 } 2078 } 2079 } 2080 } 2081 2082 /* 2083 * This function handles the command response of scan. 2084 * 2085 * The response buffer for the scan command has the following 2086 * memory layout: 2087 * 2088 * .-------------------------------------------------------------. 2089 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 2090 * .-------------------------------------------------------------. 2091 * | BufSize (t_u16) : sizeof the BSS Description data | 2092 * .-------------------------------------------------------------. 2093 * | NumOfSet (t_u8) : Number of BSS Descs returned | 2094 * .-------------------------------------------------------------. 2095 * | BSSDescription data (variable, size given in BufSize) | 2096 * .-------------------------------------------------------------. 2097 * | TLV data (variable, size calculated using Header->Size, | 2098 * | BufSize and sizeof the fixed fields above) | 2099 * .-------------------------------------------------------------. 2100 */ 2101 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 2102 struct host_cmd_ds_command *resp) 2103 { 2104 int ret = 0; 2105 struct mwifiex_adapter *adapter = priv->adapter; 2106 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 2107 struct mwifiex_ie_types_data *tlv_data; 2108 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 2109 u8 *bss_info; 2110 u32 scan_resp_size; 2111 u32 bytes_left; 2112 u32 idx; 2113 u32 tlv_buf_size; 2114 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 2115 struct chan_band_param_set *chan_band; 2116 u8 is_bgscan_resp; 2117 __le64 fw_tsf = 0; 2118 u8 *radio_type; 2119 struct cfg80211_wowlan_nd_match *pmatch; 2120 struct cfg80211_sched_scan_request *nd_config = NULL; 2121 2122 is_bgscan_resp = (le16_to_cpu(resp->command) 2123 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 2124 if (is_bgscan_resp) 2125 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 2126 else 2127 scan_rsp = &resp->params.scan_resp; 2128 2129 2130 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 2131 mwifiex_dbg(adapter, ERROR, 2132 "SCAN_RESP: too many AP returned (%d)\n", 2133 scan_rsp->number_of_sets); 2134 ret = -1; 2135 goto check_next_scan; 2136 } 2137 2138 /* Check csa channel expiry before parsing scan response */ 2139 mwifiex_11h_get_csa_closed_channel(priv); 2140 2141 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 2142 mwifiex_dbg(adapter, INFO, 2143 "info: SCAN_RESP: bss_descript_size %d\n", 2144 bytes_left); 2145 2146 scan_resp_size = le16_to_cpu(resp->size); 2147 2148 mwifiex_dbg(adapter, INFO, 2149 "info: SCAN_RESP: returned %d APs before parsing\n", 2150 scan_rsp->number_of_sets); 2151 2152 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 2153 2154 /* 2155 * The size of the TLV buffer is equal to the entire command response 2156 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 2157 * BSS Descriptions (bss_descript_size as bytesLef) and the command 2158 * response header (S_DS_GEN) 2159 */ 2160 tlv_buf_size = scan_resp_size - (bytes_left 2161 + sizeof(scan_rsp->bss_descript_size) 2162 + sizeof(scan_rsp->number_of_sets) 2163 + S_DS_GEN); 2164 2165 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 2166 bss_desc_and_tlv_buffer + 2167 bytes_left); 2168 2169 /* Search the TLV buffer space in the scan response for any valid 2170 TLVs */ 2171 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2172 TLV_TYPE_TSFTIMESTAMP, 2173 (struct mwifiex_ie_types_data **) 2174 &tsf_tlv); 2175 2176 /* Search the TLV buffer space in the scan response for any valid 2177 TLVs */ 2178 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2179 TLV_TYPE_CHANNELBANDLIST, 2180 (struct mwifiex_ie_types_data **) 2181 &chan_band_tlv); 2182 2183 #ifdef CONFIG_PM 2184 if (priv->wdev.wiphy->wowlan_config) 2185 nd_config = priv->wdev.wiphy->wowlan_config->nd_config; 2186 #endif 2187 2188 if (nd_config) { 2189 adapter->nd_info = 2190 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) + 2191 sizeof(struct cfg80211_wowlan_nd_match *) * 2192 scan_rsp->number_of_sets, GFP_ATOMIC); 2193 2194 if (adapter->nd_info) 2195 adapter->nd_info->n_matches = scan_rsp->number_of_sets; 2196 } 2197 2198 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 2199 /* 2200 * If the TSF TLV was appended to the scan results, save this 2201 * entry's TSF value in the fw_tsf field. It is the firmware's 2202 * TSF value at the time the beacon or probe response was 2203 * received. 2204 */ 2205 if (tsf_tlv) 2206 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 2207 sizeof(fw_tsf)); 2208 2209 if (chan_band_tlv) { 2210 chan_band = &chan_band_tlv->chan_band_param[idx]; 2211 radio_type = &chan_band->radio_type; 2212 } else { 2213 radio_type = NULL; 2214 } 2215 2216 if (chan_band_tlv && adapter->nd_info) { 2217 adapter->nd_info->matches[idx] = 2218 kzalloc(sizeof(*pmatch) + sizeof(u32), 2219 GFP_ATOMIC); 2220 2221 pmatch = adapter->nd_info->matches[idx]; 2222 2223 if (pmatch) { 2224 pmatch->n_channels = 1; 2225 pmatch->channels[0] = chan_band->chan_number; 2226 } 2227 } 2228 2229 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2230 &bytes_left, 2231 le64_to_cpu(fw_tsf), 2232 radio_type, false, 0); 2233 if (ret) 2234 goto check_next_scan; 2235 } 2236 2237 check_next_scan: 2238 mwifiex_check_next_scan_command(priv); 2239 return ret; 2240 } 2241 2242 /* 2243 * This function prepares an extended scan command to be sent to the firmware 2244 * 2245 * This uses the scan command configuration sent to the command processing 2246 * module in command preparation stage to configure a extended scan command 2247 * structure to send to firmware. 2248 */ 2249 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, 2250 struct host_cmd_ds_command *cmd, 2251 void *data_buf) 2252 { 2253 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan; 2254 struct mwifiex_scan_cmd_config *scan_cfg = data_buf; 2255 2256 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 2257 2258 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT); 2259 2260 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 2261 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved) 2262 + scan_cfg->tlv_buf_len + S_DS_GEN)); 2263 2264 return 0; 2265 } 2266 2267 /* This function prepares an background scan config command to be sent 2268 * to the firmware 2269 */ 2270 int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, 2271 struct host_cmd_ds_command *cmd, 2272 void *data_buf) 2273 { 2274 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config = 2275 &cmd->params.bg_scan_config; 2276 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf; 2277 u8 *tlv_pos = bgscan_config->tlv; 2278 u8 num_probes; 2279 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num; 2280 int i; 2281 struct mwifiex_ie_types_num_probes *num_probes_tlv; 2282 struct mwifiex_ie_types_repeat_count *repeat_count_tlv; 2283 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv; 2284 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv; 2285 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 2286 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv; 2287 struct mwifiex_chan_scan_param_set *temp_chan; 2288 2289 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG); 2290 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN); 2291 2292 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action); 2293 bgscan_config->enable = bgscan_cfg_in->enable; 2294 bgscan_config->bss_type = bgscan_cfg_in->bss_type; 2295 bgscan_config->scan_interval = 2296 cpu_to_le32(bgscan_cfg_in->scan_interval); 2297 bgscan_config->report_condition = 2298 cpu_to_le32(bgscan_cfg_in->report_condition); 2299 2300 /* stop sched scan */ 2301 if (!bgscan_config->enable) 2302 return 0; 2303 2304 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan; 2305 2306 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in-> 2307 num_probes : priv->adapter->scan_probes); 2308 2309 if (num_probes) { 2310 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos; 2311 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 2312 num_probes_tlv->header.len = 2313 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 2314 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes); 2315 2316 tlv_pos += sizeof(num_probes_tlv->header) + 2317 le16_to_cpu(num_probes_tlv->header.len); 2318 } 2319 2320 if (bgscan_cfg_in->repeat_count) { 2321 repeat_count_tlv = 2322 (struct mwifiex_ie_types_repeat_count *)tlv_pos; 2323 repeat_count_tlv->header.type = 2324 cpu_to_le16(TLV_TYPE_REPEAT_COUNT); 2325 repeat_count_tlv->header.len = 2326 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count)); 2327 repeat_count_tlv->repeat_count = 2328 cpu_to_le16(bgscan_cfg_in->repeat_count); 2329 2330 tlv_pos += sizeof(repeat_count_tlv->header) + 2331 le16_to_cpu(repeat_count_tlv->header.len); 2332 } 2333 2334 if (bgscan_cfg_in->rssi_threshold) { 2335 rssi_threshold_tlv = 2336 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos; 2337 rssi_threshold_tlv->header.type = 2338 cpu_to_le16(TLV_TYPE_RSSI_LOW); 2339 rssi_threshold_tlv->header.len = 2340 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold)); 2341 rssi_threshold_tlv->rssi_threshold = 2342 cpu_to_le16(bgscan_cfg_in->rssi_threshold); 2343 2344 tlv_pos += sizeof(rssi_threshold_tlv->header) + 2345 le16_to_cpu(rssi_threshold_tlv->header.len); 2346 } 2347 2348 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) { 2349 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len; 2350 2351 wildcard_ssid_tlv = 2352 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos; 2353 wildcard_ssid_tlv->header.type = 2354 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 2355 wildcard_ssid_tlv->header.len = cpu_to_le16( 2356 (u16)(ssid_len + sizeof(wildcard_ssid_tlv-> 2357 max_ssid_length))); 2358 2359 /* max_ssid_length = 0 tells firmware to perform 2360 * specific scan for the SSID filled, whereas 2361 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 2362 * wildcard scan. 2363 */ 2364 if (ssid_len) 2365 wildcard_ssid_tlv->max_ssid_length = 0; 2366 else 2367 wildcard_ssid_tlv->max_ssid_length = 2368 IEEE80211_MAX_SSID_LEN; 2369 2370 memcpy(wildcard_ssid_tlv->ssid, 2371 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len); 2372 2373 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 2374 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 2375 } 2376 2377 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos; 2378 2379 if (bgscan_cfg_in->chan_list[0].chan_number) { 2380 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n"); 2381 2382 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 2383 2384 for (chan_idx = 0; 2385 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && 2386 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2387 chan_idx++) { 2388 temp_chan = chan_list_tlv->chan_scan_param + chan_idx; 2389 2390 /* Increment the TLV header length by size appended */ 2391 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2392 sizeof( 2393 chan_list_tlv->chan_scan_param)); 2394 2395 temp_chan->chan_number = 2396 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2397 temp_chan->radio_type = 2398 bgscan_cfg_in->chan_list[chan_idx].radio_type; 2399 2400 scan_type = 2401 bgscan_cfg_in->chan_list[chan_idx].scan_type; 2402 2403 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 2404 temp_chan->chan_scan_mode_bitmap 2405 |= MWIFIEX_PASSIVE_SCAN; 2406 else 2407 temp_chan->chan_scan_mode_bitmap 2408 &= ~MWIFIEX_PASSIVE_SCAN; 2409 2410 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) { 2411 scan_dur = (u16)bgscan_cfg_in-> 2412 chan_list[chan_idx].scan_time; 2413 } else { 2414 scan_dur = (scan_type == 2415 MWIFIEX_SCAN_TYPE_PASSIVE) ? 2416 priv->adapter->passive_scan_time : 2417 priv->adapter->specific_scan_time; 2418 } 2419 2420 temp_chan->min_scan_time = cpu_to_le16(scan_dur); 2421 temp_chan->max_scan_time = cpu_to_le16(scan_dur); 2422 } 2423 } else { 2424 dev_dbg(priv->adapter->dev, 2425 "info: bgscan: Creating full region channel list\n"); 2426 chan_num = 2427 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in, 2428 chan_list_tlv-> 2429 chan_scan_param); 2430 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2431 chan_num * 2432 sizeof(chan_list_tlv->chan_scan_param[0])); 2433 } 2434 2435 tlv_pos += (sizeof(chan_list_tlv->header) 2436 + le16_to_cpu(chan_list_tlv->header.len)); 2437 2438 if (bgscan_cfg_in->start_later) { 2439 start_later_tlv = 2440 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos; 2441 start_later_tlv->header.type = 2442 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER); 2443 start_later_tlv->header.len = 2444 cpu_to_le16(sizeof(start_later_tlv->start_later)); 2445 start_later_tlv->start_later = 2446 cpu_to_le16(bgscan_cfg_in->start_later); 2447 2448 tlv_pos += sizeof(start_later_tlv->header) + 2449 le16_to_cpu(start_later_tlv->header.len); 2450 } 2451 2452 /* Append vendor specific IE TLV */ 2453 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos); 2454 2455 le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv); 2456 2457 return 0; 2458 } 2459 2460 int mwifiex_stop_bg_scan(struct mwifiex_private *priv) 2461 { 2462 struct mwifiex_bg_scan_cfg *bgscan_cfg; 2463 2464 if (!priv->sched_scanning) { 2465 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n"); 2466 return 0; 2467 } 2468 2469 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL); 2470 if (!bgscan_cfg) 2471 return -ENOMEM; 2472 2473 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA; 2474 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET; 2475 bgscan_cfg->enable = false; 2476 2477 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG, 2478 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) { 2479 kfree(bgscan_cfg); 2480 return -EFAULT; 2481 } 2482 2483 kfree(bgscan_cfg); 2484 priv->sched_scanning = false; 2485 2486 return 0; 2487 } 2488 2489 static void 2490 mwifiex_update_chan_statistics(struct mwifiex_private *priv, 2491 struct mwifiex_ietypes_chanstats *tlv_stat) 2492 { 2493 struct mwifiex_adapter *adapter = priv->adapter; 2494 u8 i, num_chan; 2495 struct mwifiex_fw_chan_stats *fw_chan_stats; 2496 struct mwifiex_chan_stats chan_stats; 2497 2498 fw_chan_stats = (void *)((u8 *)tlv_stat + 2499 sizeof(struct mwifiex_ie_types_header)); 2500 num_chan = le16_to_cpu(tlv_stat->header.len) / 2501 sizeof(struct mwifiex_chan_stats); 2502 2503 for (i = 0 ; i < num_chan; i++) { 2504 if (adapter->survey_idx >= adapter->num_in_chan_stats) { 2505 mwifiex_dbg(adapter, WARN, 2506 "FW reported too many channel results (max %d)\n", 2507 adapter->num_in_chan_stats); 2508 return; 2509 } 2510 chan_stats.chan_num = fw_chan_stats->chan_num; 2511 chan_stats.bandcfg = fw_chan_stats->bandcfg; 2512 chan_stats.flags = fw_chan_stats->flags; 2513 chan_stats.noise = fw_chan_stats->noise; 2514 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss); 2515 chan_stats.cca_scan_dur = 2516 le16_to_cpu(fw_chan_stats->cca_scan_dur); 2517 chan_stats.cca_busy_dur = 2518 le16_to_cpu(fw_chan_stats->cca_busy_dur); 2519 mwifiex_dbg(adapter, INFO, 2520 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n", 2521 chan_stats.chan_num, 2522 chan_stats.noise, 2523 chan_stats.total_bss, 2524 chan_stats.cca_scan_dur, 2525 chan_stats.cca_busy_dur); 2526 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats, 2527 sizeof(struct mwifiex_chan_stats)); 2528 fw_chan_stats++; 2529 } 2530 } 2531 2532 /* This function handles the command response of extended scan */ 2533 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, 2534 struct host_cmd_ds_command *resp) 2535 { 2536 struct mwifiex_adapter *adapter = priv->adapter; 2537 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp; 2538 struct mwifiex_ie_types_header *tlv; 2539 struct mwifiex_ietypes_chanstats *tlv_stat; 2540 u16 buf_left, type, len; 2541 2542 struct host_cmd_ds_command *cmd_ptr; 2543 struct cmd_ctrl_node *cmd_node; 2544 bool complete_scan = false; 2545 2546 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n"); 2547 2548 ext_scan_resp = &resp->params.ext_scan; 2549 2550 tlv = (void *)ext_scan_resp->tlv_buffer; 2551 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN 2552 - 1); 2553 2554 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { 2555 type = le16_to_cpu(tlv->type); 2556 len = le16_to_cpu(tlv->len); 2557 2558 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) { 2559 mwifiex_dbg(adapter, ERROR, 2560 "error processing scan response TLVs"); 2561 break; 2562 } 2563 2564 switch (type) { 2565 case TLV_TYPE_CHANNEL_STATS: 2566 tlv_stat = (void *)tlv; 2567 mwifiex_update_chan_statistics(priv, tlv_stat); 2568 break; 2569 default: 2570 break; 2571 } 2572 2573 buf_left -= len + sizeof(struct mwifiex_ie_types_header); 2574 tlv = (void *)((u8 *)tlv + len + 2575 sizeof(struct mwifiex_ie_types_header)); 2576 } 2577 2578 spin_lock_bh(&adapter->cmd_pending_q_lock); 2579 spin_lock_bh(&adapter->scan_pending_q_lock); 2580 if (list_empty(&adapter->scan_pending_q)) { 2581 complete_scan = true; 2582 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { 2583 cmd_ptr = (void *)cmd_node->cmd_skb->data; 2584 if (le16_to_cpu(cmd_ptr->command) == 2585 HostCmd_CMD_802_11_SCAN_EXT) { 2586 mwifiex_dbg(adapter, INFO, 2587 "Scan pending in command pending list"); 2588 complete_scan = false; 2589 break; 2590 } 2591 } 2592 } 2593 spin_unlock_bh(&adapter->scan_pending_q_lock); 2594 spin_unlock_bh(&adapter->cmd_pending_q_lock); 2595 2596 if (complete_scan) 2597 mwifiex_complete_scan(priv); 2598 2599 return 0; 2600 } 2601 2602 /* This function This function handles the event extended scan report. It 2603 * parses extended scan results and informs to cfg80211 stack. 2604 */ 2605 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv, 2606 void *buf) 2607 { 2608 int ret = 0; 2609 struct mwifiex_adapter *adapter = priv->adapter; 2610 u8 *bss_info; 2611 u32 bytes_left, bytes_left_for_tlv, idx; 2612 u16 type, len; 2613 struct mwifiex_ie_types_data *tlv; 2614 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv; 2615 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv; 2616 u8 *radio_type; 2617 u64 fw_tsf = 0; 2618 s32 rssi = 0; 2619 struct mwifiex_event_scan_result *event_scan = buf; 2620 u8 num_of_set = event_scan->num_of_set; 2621 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result); 2622 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size); 2623 2624 if (num_of_set > MWIFIEX_MAX_AP) { 2625 mwifiex_dbg(adapter, ERROR, 2626 "EXT_SCAN: Invalid number of AP returned (%d)!!\n", 2627 num_of_set); 2628 ret = -1; 2629 goto check_next_scan; 2630 } 2631 2632 bytes_left = scan_resp_size; 2633 mwifiex_dbg(adapter, INFO, 2634 "EXT_SCAN: size %d, returned %d APs...", 2635 scan_resp_size, num_of_set); 2636 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf, 2637 scan_resp_size + 2638 sizeof(struct mwifiex_event_scan_result)); 2639 2640 tlv = (struct mwifiex_ie_types_data *)scan_resp; 2641 2642 for (idx = 0; idx < num_of_set && bytes_left; idx++) { 2643 type = le16_to_cpu(tlv->header.type); 2644 len = le16_to_cpu(tlv->header.len); 2645 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) { 2646 mwifiex_dbg(adapter, ERROR, 2647 "EXT_SCAN: Error bytes left < TLV length\n"); 2648 break; 2649 } 2650 scan_rsp_tlv = NULL; 2651 scan_info_tlv = NULL; 2652 bytes_left_for_tlv = bytes_left; 2653 2654 /* BSS response TLV with beacon or probe response buffer 2655 * at the initial position of each descriptor 2656 */ 2657 if (type != TLV_TYPE_BSS_SCAN_RSP) 2658 break; 2659 2660 bss_info = (u8 *)tlv; 2661 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv; 2662 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2663 bytes_left_for_tlv -= 2664 (len + sizeof(struct mwifiex_ie_types_header)); 2665 2666 while (bytes_left_for_tlv >= 2667 sizeof(struct mwifiex_ie_types_header) && 2668 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) { 2669 type = le16_to_cpu(tlv->header.type); 2670 len = le16_to_cpu(tlv->header.len); 2671 if (bytes_left_for_tlv < 2672 sizeof(struct mwifiex_ie_types_header) + len) { 2673 mwifiex_dbg(adapter, ERROR, 2674 "EXT_SCAN: Error in processing TLV,\t" 2675 "bytes left < TLV length\n"); 2676 scan_rsp_tlv = NULL; 2677 bytes_left_for_tlv = 0; 2678 continue; 2679 } 2680 switch (type) { 2681 case TLV_TYPE_BSS_SCAN_INFO: 2682 scan_info_tlv = 2683 (struct mwifiex_ie_types_bss_scan_info *)tlv; 2684 if (len != 2685 sizeof(struct mwifiex_ie_types_bss_scan_info) - 2686 sizeof(struct mwifiex_ie_types_header)) { 2687 bytes_left_for_tlv = 0; 2688 continue; 2689 } 2690 break; 2691 default: 2692 break; 2693 } 2694 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2695 bytes_left -= 2696 (len + sizeof(struct mwifiex_ie_types_header)); 2697 bytes_left_for_tlv -= 2698 (len + sizeof(struct mwifiex_ie_types_header)); 2699 } 2700 2701 if (!scan_rsp_tlv) 2702 break; 2703 2704 /* Advance pointer to the beacon buffer length and 2705 * update the bytes count so that the function 2706 * wlan_interpret_bss_desc_with_ie() can handle the 2707 * scan buffer withut any change 2708 */ 2709 bss_info += sizeof(u16); 2710 bytes_left -= sizeof(u16); 2711 2712 if (scan_info_tlv) { 2713 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi)); 2714 rssi *= 100; /* Convert dBm to mBm */ 2715 mwifiex_dbg(adapter, INFO, 2716 "info: InterpretIE: RSSI=%d\n", rssi); 2717 fw_tsf = le64_to_cpu(scan_info_tlv->tsf); 2718 radio_type = &scan_info_tlv->radio_type; 2719 } else { 2720 radio_type = NULL; 2721 } 2722 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2723 &bytes_left, fw_tsf, 2724 radio_type, true, rssi); 2725 if (ret) 2726 goto check_next_scan; 2727 } 2728 2729 check_next_scan: 2730 if (!event_scan->more_event) 2731 mwifiex_check_next_scan_command(priv); 2732 2733 return ret; 2734 } 2735 2736 /* 2737 * This function prepares command for background scan query. 2738 * 2739 * Preparation includes - 2740 * - Setting command ID and proper size 2741 * - Setting background scan flush parameter 2742 * - Ensuring correct endian-ness 2743 */ 2744 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 2745 { 2746 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 2747 &cmd->params.bg_scan_query; 2748 2749 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 2750 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 2751 + S_DS_GEN); 2752 2753 bg_query->flush = 1; 2754 2755 return 0; 2756 } 2757 2758 /* 2759 * This function inserts scan command node to the scan pending queue. 2760 */ 2761 void 2762 mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 2763 struct cmd_ctrl_node *cmd_node) 2764 { 2765 struct mwifiex_adapter *adapter = priv->adapter; 2766 2767 cmd_node->wait_q_enabled = true; 2768 cmd_node->condition = &adapter->scan_wait_q_woken; 2769 spin_lock_bh(&adapter->scan_pending_q_lock); 2770 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 2771 spin_unlock_bh(&adapter->scan_pending_q_lock); 2772 } 2773 2774 /* 2775 * This function sends a scan command for all available channels to the 2776 * firmware, filtered on a specific SSID. 2777 */ 2778 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 2779 struct cfg80211_ssid *req_ssid) 2780 { 2781 struct mwifiex_adapter *adapter = priv->adapter; 2782 int ret; 2783 struct mwifiex_user_scan_cfg *scan_cfg; 2784 2785 if (adapter->scan_processing) { 2786 mwifiex_dbg(adapter, WARN, 2787 "cmd: Scan already in process...\n"); 2788 return -EBUSY; 2789 } 2790 2791 if (priv->scan_block) { 2792 mwifiex_dbg(adapter, WARN, 2793 "cmd: Scan is blocked during association...\n"); 2794 return -EBUSY; 2795 } 2796 2797 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 2798 if (!scan_cfg) 2799 return -ENOMEM; 2800 2801 scan_cfg->ssid_list = req_ssid; 2802 scan_cfg->num_ssids = 1; 2803 2804 ret = mwifiex_scan_networks(priv, scan_cfg); 2805 2806 kfree(scan_cfg); 2807 return ret; 2808 } 2809 2810 /* 2811 * Sends IOCTL request to start a scan. 2812 * 2813 * This function allocates the IOCTL request buffer, fills it 2814 * with requisite parameters and calls the IOCTL handler. 2815 * 2816 * Scan command can be issued for both normal scan and specific SSID 2817 * scan, depending upon whether an SSID is provided or not. 2818 */ 2819 int mwifiex_request_scan(struct mwifiex_private *priv, 2820 struct cfg80211_ssid *req_ssid) 2821 { 2822 int ret; 2823 2824 if (mutex_lock_interruptible(&priv->async_mutex)) { 2825 mwifiex_dbg(priv->adapter, ERROR, 2826 "%s: acquire semaphore fail\n", 2827 __func__); 2828 return -1; 2829 } 2830 2831 priv->adapter->scan_wait_q_woken = false; 2832 2833 if (req_ssid && req_ssid->ssid_len != 0) 2834 /* Specific SSID scan */ 2835 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 2836 else 2837 /* Normal scan */ 2838 ret = mwifiex_scan_networks(priv, NULL); 2839 2840 mutex_unlock(&priv->async_mutex); 2841 2842 return ret; 2843 } 2844 2845 /* 2846 * This function appends the vendor specific IE TLV to a buffer. 2847 */ 2848 int 2849 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 2850 u16 vsie_mask, u8 **buffer) 2851 { 2852 int id, ret_len = 0; 2853 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 2854 2855 if (!buffer) 2856 return 0; 2857 if (!(*buffer)) 2858 return 0; 2859 2860 /* 2861 * Traverse through the saved vendor specific IE array and append 2862 * the selected(scan/assoc/adhoc) IE as TLV to the command 2863 */ 2864 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 2865 if (priv->vs_ie[id].mask & vsie_mask) { 2866 vs_param_set = 2867 (struct mwifiex_ie_types_vendor_param_set *) 2868 *buffer; 2869 vs_param_set->header.type = 2870 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 2871 vs_param_set->header.len = 2872 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 2873 & 0x00FF) + 2); 2874 if (le16_to_cpu(vs_param_set->header.len) > 2875 MWIFIEX_MAX_VSIE_LEN) { 2876 mwifiex_dbg(priv->adapter, ERROR, 2877 "Invalid param length!\n"); 2878 break; 2879 } 2880 2881 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 2882 le16_to_cpu(vs_param_set->header.len)); 2883 *buffer += le16_to_cpu(vs_param_set->header.len) + 2884 sizeof(struct mwifiex_ie_types_header); 2885 ret_len += le16_to_cpu(vs_param_set->header.len) + 2886 sizeof(struct mwifiex_ie_types_header); 2887 } 2888 } 2889 return ret_len; 2890 } 2891 2892 /* 2893 * This function saves a beacon buffer of the current BSS descriptor. 2894 * 2895 * The current beacon buffer is saved so that it can be restored in the 2896 * following cases that makes the beacon buffer not to contain the current 2897 * ssid's beacon buffer. 2898 * - The current ssid was not found somehow in the last scan. 2899 * - The current ssid was the last entry of the scan table and overloaded. 2900 */ 2901 void 2902 mwifiex_save_curr_bcn(struct mwifiex_private *priv) 2903 { 2904 struct mwifiex_bssdescriptor *curr_bss = 2905 &priv->curr_bss_params.bss_descriptor; 2906 2907 if (!curr_bss->beacon_buf_size) 2908 return; 2909 2910 /* allocate beacon buffer at 1st time; or if it's size has changed */ 2911 if (!priv->curr_bcn_buf || 2912 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 2913 priv->curr_bcn_size = curr_bss->beacon_buf_size; 2914 2915 kfree(priv->curr_bcn_buf); 2916 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 2917 GFP_ATOMIC); 2918 if (!priv->curr_bcn_buf) 2919 return; 2920 } 2921 2922 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 2923 curr_bss->beacon_buf_size); 2924 mwifiex_dbg(priv->adapter, INFO, 2925 "info: current beacon saved %d\n", 2926 priv->curr_bcn_size); 2927 2928 curr_bss->beacon_buf = priv->curr_bcn_buf; 2929 2930 /* adjust the pointers in the current BSS descriptor */ 2931 if (curr_bss->bcn_wpa_ie) 2932 curr_bss->bcn_wpa_ie = 2933 (struct ieee_types_vendor_specific *) 2934 (curr_bss->beacon_buf + 2935 curr_bss->wpa_offset); 2936 2937 if (curr_bss->bcn_rsn_ie) 2938 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2939 (curr_bss->beacon_buf + 2940 curr_bss->rsn_offset); 2941 2942 if (curr_bss->bcn_ht_cap) 2943 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2944 (curr_bss->beacon_buf + 2945 curr_bss->ht_cap_offset); 2946 2947 if (curr_bss->bcn_ht_oper) 2948 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *) 2949 (curr_bss->beacon_buf + 2950 curr_bss->ht_info_offset); 2951 2952 if (curr_bss->bcn_vht_cap) 2953 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf + 2954 curr_bss->vht_cap_offset); 2955 2956 if (curr_bss->bcn_vht_oper) 2957 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf + 2958 curr_bss->vht_info_offset); 2959 2960 if (curr_bss->bcn_bss_co_2040) 2961 curr_bss->bcn_bss_co_2040 = 2962 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset); 2963 2964 if (curr_bss->bcn_ext_cap) 2965 curr_bss->bcn_ext_cap = curr_bss->beacon_buf + 2966 curr_bss->ext_cap_offset; 2967 2968 if (curr_bss->oper_mode) 2969 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf + 2970 curr_bss->oper_mode_offset); 2971 } 2972 2973 /* 2974 * This function frees the current BSS descriptor beacon buffer. 2975 */ 2976 void 2977 mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2978 { 2979 kfree(priv->curr_bcn_buf); 2980 priv->curr_bcn_buf = NULL; 2981 } 2982